There are found a few available research findings on the electron microscopy of cementum by men such as HELMCKE [1], MATSUMIYA and TAKUMA [2], and AWAZAWA [3]. They are far from being a systematic investigation of cementum as a whole.
The present report of the author, though neither deep nor exhaustive, is given in the hope that it will be found to possess not a few interesting points hitherto undetected or ignored by the previous workers in the field.
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